Moon

Moon

The Earth's only natural satellite. The moon has a cold, dry orb covered with many lunar craters and strewn with rocks and dust. The moon has no atmosphere. But recent lunar missions have found plenty frozen water on the moon.

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Moon

Palus

Astronomy; Moon

A Latin term meaning swamp that is used to describe topographical features on the moon which resemble dark plains or swamps.

Diurnal

Astronomy; Moon

A reference to a period of one day. In astronomy, diurnal generally refers to the motion of an object in a 24 hour period. An example would be Moon-rise. These activities repeat every 24 hours. ...

Celestial mechanics

Astronomy; Moon

The branch of astronomy that describes the motions and gravitational effects of celestial objects.

Colongitude

Astronomy; Moon

Also called selenographic colongitude, it is the longitude on the surface of the Moon marked by the edge of the area illuminated by the Sun.

Declination

Astronomy; Moon

The angle measured between the celestial equator and a celestial body, such as the moon, in the sky.

Crater wall

Astronomy; Moon

The circular, cliff-like wall formed by the impact of a meteor on the lunar surface.

Conjunction

Astronomy; Moon

The position of two celestial bodies when they are in line with one another as seen from the perspective of an Earth-bound observer. The new moon is also referred to as moon in conjunction with the ...